yadro-task/tests/generate_input.cpp

#include "tapelib/filetape.h"
#include <cstddef>
#include <cstdlib>
#include <ctime>
#include <fstream>
#include <iostream>
#include <string>

using std::setfill;
using std::setw;
using std::string;
using std::to_string;
using namespace tape;

/**
 * Generate big input data sets for external sort testing.
 * Takes 2 positional arguments - first one is the ouput file name,
 * secon one is the amount of random cells that will be generated.
 * Each cell value is in range [0; RAND_MAX]
 */
int main(int argc, char *argv[]) {
    if (argc < 3) {
        std::cerr << "Not enough arguments" << std::endl;
        return -1;
    }
    string out_name = argv[1];         // NOLINT
    size_t cells = std::stoi(argv[2]); // NOLINT
    std::ofstream out(out_name);
    if (!out.is_open()) {
        std::cerr << "Failed to open file" << std::endl;
        return -1;
    }
    srand(time(nullptr));
    out << setfill('0') << setw(tape::FT_CELL_SIZE) << to_string(rand());
    for (size_t i = 1; i < cells; i++) {
        out << FT_DELIMETER << setfill('0') << setw(tape::FT_CELL_SIZE)
            << to_string(rand());
    }
    return 0;
}